I have taken my truck into the dealer for extended warranty repairs on the AC since July 2011. Twice they refilled the freon and continually claim there is no leak. In October they even placed seals on the AC ports so I could not monitor the system myself. In November the extended warranty expired, in December the dealership was sold, and now my AC has again quite altogether. Whom do I sue for the repairs? The old dealership corporation, the new auto group which bought the dealership, or do I file a claim with the California department of insurance against the extended warranty company. The extended warranty company says I have no claim since the dealership never found a leak, but the AC failing every three months proves there must be a leak.